Highlighted Article: Harbour porpoises are small marine mammals that have high field metabolic rates, and offset increased thermoregulatory costs in winter by building a thick blubber layer during the autumn.

Summary: Heart mitochondria show suppressed reactive oxygen species (ROS) generation when isolated from anoxic turtles. Surprisingly, complex I S-nitrosation, a potent modification inhibiting ROS production, is not involved in this response.

Summary: A multifactorial experiment reveals no effect of oxygen on coral photosynthesis and an increase in coral photosynthesis under high flow and a doubled concentration of dissolved carbon dioxide.